The Effect of Gradients in the GPS Estimation of Tropospheric Water Vapor

A.J. Coster, A.E. Niell, F.S. Solheim, V.B. Mendes, P.C. Toor, R.B. Langley

Abstract:	The Westford Water Vapor Experiment (WWAVE) was designed to measure the temporal and spatial variability of the total precipitable water vapor over an area within a 25 km radius of the Haystack Observatory in Westford, MA. The main experiment was conducted from 15-30 August 1995, and a variety of different techniques were used to measure the water vapor, including: radiosondes, launched two to three times daily from one location; a water vapor radiometer (WVR); and eleven GPS receivers separated by 0.5 to 35 km. The WVR scanned continuously in azimuth and elevation. Line of sight measurements of the wet delay by the WVR were used to estimate spatial and temporal gradients in the water vapor distribution. GPS data were analyzed for correlations with times of large gradients.
Published in:	Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997) June 30 - 2, 1997 Albuquerque, NM
Pages:	107 - 114
Cite this article:	Coster, A.J., Niell, A.E., Solheim, F.S., Mendes, V.B., Toor, P.C., Langley, R.B., "The Effect of Gradients in the GPS Estimation of Tropospheric Water Vapor," Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997), Albuquerque, NM, June 1997, pp. 107-114.
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